Focusing-lamp socket



June 19, 1923.

F. H. WETZEL FOCUSING LAMP SOCKET I Filed Auz. 27. 1920 R. ml e mu H: m .F. H

0 s a 1 4 1m 3 m a ATTORNEY Patented June 19, 1923.

henna. warzan, or'ToLnno, jomo, ASSIGNOR 'ro wnmzs 1,459,700 HCE,

OHIO, A CORPORATION OF DELAWARE.

FOCUSIHG-P SECRET.

Application filed August 27, me. serial no. teeter.

To all whom it may 1 Be it known that I FRED WETZEL, a citizen of the United tates, residlng at 'Ijoledo, county of Lucas, and State of Ohio, have invented certain new and useful Improvements in Focusin -L amp Sockets of which I declare the 0 owing to be a full, clear, and exact description.

This invention relates to headl ghts, spotlights, projecting lights and the l1ke and reference particularly to means for holding and focusing the lamp carried by such.

An ob'ect of the invention. is to provide improve means for holding a lamp such as an electric globe and for conveniently focusin the same, which shall be strong, durable, e cient both electrically and mechanically and adapted for quantity production at a minimum cost.

Further objects of this invention relate to economics of manufacture and details of construction as will hereinafter appear from the detailed description to follow. I accomplish the objects of my invention in one instance by the devices and means described in the following specification, A structure constituting one embodiment of my invention, which may be the preferred, 1s lllustrated in the accompanyin drawings forming a part hereof, in whicE:

' igure I is an elevation partly in section of a headlight illustrating my invention.

Fig. II is a sectional view similar to that of Fig. I but to a larger scale and -Fig. III is a sectional view taken in the line III-III of Fig. II.

In the drawings the same reference numerals refer to similar parts throughoutthe several, views .and the sectional views are taken looking in the direction of the arrows at the ends of the section lines.

Referring to the drawing, where I have chosen to illustrate my invention as applied to an automobile headlamp, an external casing 5 encloses arefiector 6 in which is lo.- cated a source of light, such as an electric lamp 7. The central portion of the reflector is provided with an aperture .in which is fitted-a sleeve 9 whose front end portion is suitably expanded as at 10 and 11 to cause it to firmly clamp the reflector. Slidably mounted within the sleeve member 9 is a sec; ond sleeve or tubular-member 12 whose forward end is adapted to receive the plug portion" of'the lamp 7 and which is provided with a bayonet slot 14 for receiving the pin 15 of the lamp plug in the usual manner. To prevent the sleeve 12 from turning in the sleeve 9 1t is provided with an integral lug 18 which is stamped up from the wall of the sleeve and engages in a longitudinal slot 19 in the outer sleeve. Intermediate the ends of the sleeve 12 is a disk 20 of insulating materlal which fits snugly within the sleeve and is further securely held from longitudinal movement by two integral lugs 21 stamped up from'the walls ofthe sleeve and engaging opposite sides of the disk 20. slldes freely through the middle of the disk 20 and has its head 24 normally pressed forward by a coil spring 25 to yieldingly engage the center terminal 26 of the lamp plug. The rear or threaded portion of the screw 23 is threaded in the terminal plug 28 to which 1s attached one end .of the flexible conductor 29. The opposite end of this conductor connects with a second terminal block 30 forming a part of a socket member 31 secured to the outer casing5 and by means of which the lamp is connected to the exter-' nal circuit. A suitable opening 33 is provided in the sleeve 12 for the passage therethrough of the flexible conductor29. In order to slide the inner tube longitudinally to adjust the position of the lamp for proper focus the rear end of the sleeve 12 1s provided with an end plate 35 having in this particular instance three notches 36 1n which lie three lugs 37 integral with the sleeve 12 and which are bent over to enga e the outer face of theiplate 35. The centre. portion of the plate 35 isprovided with a square depresslon 39 for the reception of the square head 10 of thevscrew 41 which may be rigidly secured to the plate 35 by solder, if such is found desirable. Between the outer face of the plate-35 and the casing 5 is a coil spring 43 to normally urge the sleeve 12 for vgard and a thumb nut 45 is threaded on the outer end of the bolt 41 and bears against the outer flattened portion 46 of the casing. It-will be readily seen from'the description above that by turning this thumb nut the sleeve 12 carrying the lamp may be moved forward or backward to vary the position and focus the lamp without disturbing the "lamp mounting or the circuit.

It is, of course, apparent that the devices 'and means as described relative to this inventlonmay be varied .widely without de- COBPOEA'IION, 0F TOLEDO,

-A screw 23.

said tubular member; lugs in said member eng the outer faee of said late 'a bolt rigidiy secured to said plate p 7 tween said casing and said plate and a nut on the outer side of said casmg threaded on said bolt.

In testimony whereof, I afiix my signature.

FRED H. WETZEL,

a spring be- 

